Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 363
with ahollow extremity, and the negative irregularly convex fig. 22a(Fig. 222). 344 Electricity. [Book III. 229. Arrangement of Arc Lamps.—In arrangingthese lamps it is impossible to use multiple arc, as theresistance in each changes so rapidly that we should have ateach instant only the one… … Fig. 223. The current which will then light one will light any number,but it is obvious that the E.M.F. must be proportional to thenumber of lamps in circuit, to keep up the current against the increased resistance. In this case the external resist-ance is necessarily very great, and the dynamo or…
Electricity
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